Electric swivel-coupling lock



T. L. DENNIS.

ELECTRIC SWIVELr CDUPLING LOCK.

APPLICATION FILED AUGJB, 1920.

1,404,098, L Patented Jan. 17,1922.

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'ntomas L. DENNIS, 0E NEW Your, N. Y., AssrGNoE To eEoaeE E.' 'PARKERy 'or NEW YoEx, N.

ELECTRIC SWIVEIrCOUPLING LOCK.

To @ZZ/whom tmay concern.'-A y Be it kno-wn that I, THOMAS L. DENNIS, a citizen of the United States, and a `resident of the cit oit' New York, Prince Bay, borough4 of ichmond, in the county of Richmond and State 'of -N ew York, have invented a new and ImprovedElectric Swivel-Coupling Lock, of which the 'following is al full, clear, and exact description. y

This invention relates to a combined swivel coupling and lock and has for an object to provide an improved construction wherein the plugs or connecting pins of the lead-in wires are locked against accidental removal. Another object of the invention is -to provide alocking device for plugs which will prevent the lugs from being removedl by a direct ull t ereon. I

'A still further object of the invention is to provide an improvedA construction of plug designed to co-operate with my improved vswivel disclosed 1n my co-pending application, Serial No. 384,696, led May 27, 1920.

. An additional object more specifically is to provide an arrangement of plug and socket wherein the plugs or terminals may be easily inserted by being pushed into the socket but whichare locked against an outer pull without a previous releasing having been a'ected.

In the accompanying drawing- Figure 1 is a longitudinal verticaly section througha swivel and a locking plug combined, disclosing one embodiment of the invention. y

Figure 2 is an end view of one section of v s ings 24 and 25 are provlded which merge the swivel coupling shbwn in Figure 1.

. Figure 3 is a sectional view through Figure 2 on line 3 3.

Figure 4 is a` transverse sectional Yview through Figure lon line 4--4.

Flgure 5 1s a transverse sectional viewthrough Figure 1 on line 5 5. l vFigure 6 is'an end View -of a hook member v 454 embodyin certain features of the invention. Figure. is an enlarged detail fragmentaryside view showing the interlocking ends of one of the plug associated parts shown in Figure 1. eferrin to the accompanying drawingby numera s 1 indicatesthe swivel coupling ..-.mwhich is constructed according to the principal disclosed in my co-pendingapplication p above referred to. Briefly this coupling consistsofa casing Spec'ication of VIcttersAPatent.

ratentei Jan.f17, '19.22.`

' Application tiled-August -18., 1920. Serial No. 404,455.

2 carrying the posts 3 and 4', the post `3hav-Y lng an aperture for receiving the connecting bolt 5 and the post 4 has an extension into which the spring contact'6 fits, said contact contlnually frictionally engaging the contact rlng 7 carried by casing 8.` f

In the application above referred to, the block 9'of metal into which screw 5 is thread, ed and the ring 7 are connected to two binding posts similar to 3 and 4 but in the pres- 65 ent construction the connections have been 'changed to agree with the inventive idea dis- ,j closed in the drawing. ,a i.,

As shown in Figures 1 and 6, asp'ring or resilient hook 10 is provided inthe casing 8 70 and is formed with an enlarged apertured end 11 through which .the exten/sion 12 on hook is formed with an interlocking -projection 13 similar to the interlocking projection 14 of the hook 15. The. hook 15 is formed with a bent'end 16 through iwhicht'he rivet or other connection member L17 extends, said rivet or other connecting means extending through or interlocking with the ring 7 so that the hook 15 is in continuous electrical communication with post 4.

`The casing 8 is provided with an annular bore 18 so that the ring 7 may be moved 85 therein flat-wise until it presses against the bottom 19 of the recess 18. "The pair of side passage-ways 2O and 21 are provided for the respective hooks 10 and 15, said side passage-Ways merging into auxiliary or plug passage-ways 22 and 23. Transverse openinto the passageways 20 and 21, said transverse passage-ways accommodating the but- 'tons 25 and 26, each of which is provided 95l with a groove 27 into which a dividing ring 28 is fitted. The ring 28 is preferably of resilient or springmetal and is snapped into .place so as. to resistac'cidental removal of the buttons but lpermit the buttons to be passed inwardly for shifting the position of .the hooks 10 and 15 as shown in Figures 2 'shown in Figure 1 a pair of plugsv 32 and` 33 are carried by plug head 34 and are insertible through the plug openings 22 and -23-so .that the hook ends 34 and 35 thereto will interlock with projections 13 and 14.

' vThe detail arrangements of these interlockingy parts is shown in Figure 7 from which will be seen that the projections 13 I' and 14are at a greater angle than a right angle and thecontact surface 36 of the re spective hook member-'S34 and 35 is also at a greaterangle so that the spring action of the'respective members 10,and 15 causes the interlocking projections 13 and 14 to press against the respective "surfaces 36 and hold the plugs 32 and 33 tightly in place and againstA the removal by an outward pull un- 1es..thebuaons 25 and .2e have been dev pressed. The respective plugs 32 and 33 are provided with enlargements 37 and 38 which are' preferably formed 'with threaded .bores for receiving the screws 39A and I4 0 which connect the cad-in wires 41 and 42 to the l' enlargements 37 and 38. If desired, the

' movable cap 43 so as to give afmished ap# havin plug head 34 may be provided with a re' pearance to the construction.

What I claim is 1. A plu and socket'member comprising aplug 'hea a pairv of plugs carried by the headland having notched stems, a socketcasing vprovidbd. with 'longitudinal passages reduced outer ends through Whichthe p ug stems extend `into said passages, spring hooked contact members inthe passages of the socket casing and engaging the notches of the plug stems, whereby,7 the plugs-will be held tightly in place'v and prevented from accidental disengagement from the contact members, and buttons mounted in the socket casing and engaging the hooked contactmembers to disengage them from the plug stems. l

2. A coupling and lock, comprising two 'members rotatably connected, one of the members belng provided with longitudinal pass-ages, contacts carried by themembers, a plug head, plugs carried by the head and having stems extending 'into the passages,

members rotatably connected, one of the'v members having longitudinal passages terminating in reduced outer port1onscontacts 'between the members, one of. the ,contacts being in .the form of'a ring and arranged vin the member' with the passages, .hooked spring; contact members in the said passages, one of the contacts being-secured to the ring contact, plugs having. reduced and notched stems, said stems extending through the reduced portions of the passages and engaging the vhooked contacts, and buttons.

in the said member and engaging the hooked contact members.

i 4. A coupling and hook, comprising two members rotatably connected, one ,of the members being providedwith a central recess, an annular recess and longitudinal passages leading rom the annular recess, a

metal blocksecured in thecentral recess, a screw. carried by the other member and engaging saidblockto hold the members 'together, a ring shaped contact in the annular recess, a spring contact carried by the other member and engaging the vring contact,

hooked contact members in the said passages, one contact member'being secured tov the ring contact, and theother to the `metal block, av plug head, pl

into the said passages and engaging the hookedontact members, and buttons engaging the hooked contact members. f

carried by thev head and having notche stems lextending THOMAS L. DefisINi-s,j 

